Update README.md

Author: soranerai

README.md

@@ -10,7 +10,7 @@ If you want to install MTProxy, open 443 port, if you want to install SOCKS5, op
 
 ### How to install?
 
-1. `git clone https://github.com/aire1/mtproxy_autoinstaller.git; cd mtproxy_autoinstaller`
+1. `git clone -b stable https://github.com/aire1/mtproxy_autoinstaller.git; cd mtproxy_autoinstaller`
 2. `sudo chmod ugo+x install.sh && sudo chmod ugo+x socks_install.sh && sudo chmod ugo+x set_AD_TAG.sh`
 3. `./install.sh` (or `./socks_install.sh` if you want to install socks5 proxy)
 4. Just copy link and use your proxy!